Question

A grey cast iron casting is to be produced of size: 200$\times$100$\times$46 mm with shrinkage allowance of 2% and machining allowance of 2 mm/side. The volume of pattern is

• A. 1039584 mm${}^3$
• B. 1.082$\times$10${}^8$ mm${}^3$
• C. 1060800 mm${}^3$
• D. 998416 mm${}^3$

Answer 1

The correct option is D 998416 mm${}^3$

Grey cast iron casting size

$=200\times 100\times 46mm$

Shrinkage allowance = 2%

Machining allowance of 2 mm/side
Volume of pattern =?

$L=(200+4)\times 0.98=199.92w=(100+4)\times 0.98=101.92T=(46+4)\times 0.98=49V_p=199.92\times 101.92\times 49V_p=998416m{m}^3$